Triumph Gold: Hunting the Porphyry Elephant
One of the challenges the Yukon poses is to think “big enough”. As you fly over you see hundreds of placer operations, some recreational, some huge, all pulling gold in flakes and nuggets from the creeks which run between the hills and mountains. The essential geological insight is that the placer gold in the creeks came from somewhere and the logical place to look are the valley walls surrounding the creeks. Which is fine as far as it goes, but where did that gold come from?
